debug interface for dhb created.

This is useful to track states or values
in child handler. some documentation added.
New doxygen group for interfaced added.

action/HasActionsIF.h

@@ -7,8 +7,10 @@
 #include <framework/returnvalues/HasReturnvaluesIF.h>
 #include <framework/ipc/MessageQueueIF.h>
 /**
- * \brief Interface for component which uses actions
+ * @brief
+ * Interface for component which uses actions
  *
+ * @details
  * This interface is used to execute actions in the component. Actions, in the sense of this interface, are activities with a well-defined beginning and
  * end in time. They may adjust sub-states of components, but are not supposed to change
  * the main mode of operation, which is handled with the HasModesIF described below.
@@ -23,6 +25,8 @@
  * parameters and immediately start execution of the action. It is, however, not required to
  * immediately finish execution. Instead, this may be deferred to a later point in time, at
  * which the component needs to inform the caller about finished or failed execution.
+ *
+ * \ingroup interfaces
  */
 class HasActionsIF {
 public: